Gbps

from The Free On-line Dictionary of Computing (8 July 2008)

gigabits per second
gbps

   <unit> (Gbps) A unit of information transfer rate equal to one
   billion {bits} per second.  Note that, while a {gigabit} is
   defined as a power of two (2^30 bits), a gigabit per second is
   defined as a power of ten (10^9 bits per second, which is
   slightly less) than 2^30).

   (2004-02-10)